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Abstract
A 13.9 m2(150 ft2) vegetable garden grown in Columbus, Ohio, in 1975 yielded 95.5 kg of produce or 6.85 kg per m2. The produce had a retail value of $90.45 or $6.50 per m2. The mean economic savings from all vegetables disregarding any labor and transportation expenses was $3.01 per m2 or $42 for the garden.
Poster Session 35—Vegetable Crops Management–Cropping Systems 2 20 July 2005, 12:00–12:45 p.m. Poster Hall–Ballroom E/F
Abstract
Dietitians and nutritionists have included vegetables among 4 of the 7 basic food groups used in planning meals. Because of the variety and quantity of vegetables we are able to furnish in this country, either fresh or processed, it is an easy task to prepare a well-balanced diet without too much concern for the differences in composition among vegetable types. It is no wonder, then that until very recently little attention has been directed to the differences which exist within vegetable types.
The utility of presidedress soil nitrate testing (PSNT) in irrigated lettuce (Lactuca sativa L.) and celery (Apium graveolens L.) production was evaluated in 15 commercial fields in California from 1996 to 1997. Fields were selected in which soil NO3-N (5- to 30-cm depth) was >20 mg·kg–1 at the time the cooperating grower made the first sidedress N application. The grower's N regime was compared with reduced N treatments established by reducing or eliminating one or more sidedress applications. All fields were sprinkler and/or furrow irrigated, with minimal in-season precipitation. Reductions in seasonal N application averaging 143 and 209 kg·ha–1 N in lettuce and celery trials, respectively, had no effect on marketable yield in any field. Crop biomass N at harvest in the lowest N treatment in each field averaged 94% (lettuce) and 88% (celery) of that in plots receiving the full grower N program. Based on controlled-environment aerobic incubation of soil from 30 fields in long-term vegetable rotations, in-season N mineralization averaged 1% to 2% of soil organic N. A soil NO3-N “quick test” procedure utilizing a volumetric extraction of field-moist soil and measurement by nitrate-sensitive colorimetric test strips was evaluated and proved to be a practical on-farm method to estimate soil NO3-N concentration. Lettuce midrib NO3-N concentration at cupping stage was poorly correlated with current soil NO3-N level. We conclude that PSNT can reliably identify fields in which sidedress N application can be delayed or eliminated without affecting crop performance.
Foods from plants can provide enough energy and essential nutrients for maintaining human health as well as for prevention of many serious diseases. Many exotic vegetables are known for their special nutritional and medicinal properties. Bitter Melon (Momordica charantia L.), an annual vegetable of Cucurbitaceae family, is found to be one of the important vegetables of special nutritional and medicinal qualities. Germplasm lines and land races of Bitter Melon were evaluated in 2000 and 2001 for their adaptability in Southeast Arkansas. Seven adaptable lines/varieties were tested in replicated field trials for productivity at the Univ. of Arkansas at Pine Bluff Agricultural Research Center in 2002 and 2003. Melons were harvested at their marketable stages beginning in June and ending in September for yield estimation. Nutritional qualities of Bitter Melons were examined by chemical analyses conducted at the Univ. of Arkansas, Fayetteville (UAF) Food Science Laboratory. Analyses for antioxidants and other compounds as well as cooking qualities are currently underway. Several recipes have been tasted for consumer acceptance. The popular belief of bitter melon to improve glucose tolerance in Type II diabetes and lower blood cholesterol are being investigated. It is still to be determined if the chemical constituents such as certain alkaloids and polypeptides found in bitter melons are effective individually or in combination.
Abstract
Two levels of phosphorus (20 and 80 kg P/ha) and two levels of aluminum (0 and 85 kg Al/ha) were applied to Enders soils of pH 4.4, 6.6, or 7.3. Sixteen-day-old vegetable amaranth (Amaranthus tricolor L.) plants (Rodale Research Center Accession 241) were transplanted 24 July 1986 and harvested 27 days later. Increasing soil pH from 4.4 to 7.3 decreased plant height, fresh weight, leaf area, leaf blade chlorophyll, N, K, Mn, and Zn, but increased Ca, Mg, Al, and Na (dry-weight basis). Supplemental P increased plant height, leaf area, plant dry weight, leaf blade P, K, Ca, Mg, Na, and chlorophyll; decreased Fe, B, Zn, and Al; but had no effect on leaf blade protein. Adding Al to the soil decreased plant height, leaf blade chlorophyll, N, P, and Na, but increased Mn. At the termination of the experiment, exchangeable soil Al was found only in soil at pH 4.4 (1.1 cmol·kg-1). The highest leaf blade Al concentration (2473 mg·kg-1) was found in soil at pH 6.6 that received the low rate of supplemental P. Regardless of soil pH, leaf blade Al was negatively correlated with plant height (r = -0.78), plant dry weight (r = -0.78), available soil P (r = -0.51), and leaf blade P (r = -0.53), but it was positively correlated with Fe (r = 0.98).
Abstract
Two home vegetable gardens (77.4 and 58.3 m2) in Tucson, Ariz., yielded an average of 1.24 and 2.31 kg/m2 of produce per year over 3 and 2.5 years, respectively. Average net returns were $109 and $123 per year, $0.72 and $1.11 per hour, or $8.80 and $7.75 per dollar of water used. Thus, in the southwest desert, a weekly investment of 2-to-3 hours in a home garden can provide savings.
period of time, from 35% to 32%. Similar low current intake values were noted by Guenther et al. (2006) and Kimmons et al. (2009) . Low intake of vegetables and fruits is not a problem unique to the United States because Food and Agricultural
understand the in vivo effect of various bioactive compounds and their mode of action. AMARANTH Amaranth is one of the few cultivated plants used both as a vegetable and cereal. Amaranth is also cultivated for their ornamental and forage value. Several
orange and red vegetables and leafy greens have been noted to contain vitamin E. Murphy et al. (1990) found that vegetables were the second largest contributor, after fats and oils, to vitamin E intake in the adult U.S. diet, representing 15.1% of the